Photo of the Day

Photo: A foot-long crayfish swims in a canyon in Australia.
February 5, 2012

Crayfish, Australia

This Month in Photo of the Day: Animal Pictures

A foot-long crayfish dodges a hiker fording a stream in Australia's Claustral Canyon. The color of these crayfish, called yabbies by canyoneers, remains a puzzle. In some streams they're orange. In others they're blue. The difference is due partly to water purity—the blue ones are found in the clearest water.

See more pictures from the October 2011 feature story “Deep Down Under.”


See pictures of scary freshwater animals »

Photograph by Carsten Peter, National Geographic

Go Further

Subscriber Exclusive Content

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history